Ring sizes: inner diameter mm : 16 | 16,5 | 17 | 17.5 | 18 | 18.5 | 19 Size USA: 5.5 | 6 | 6.5 | 7.25 | 7.75 | 8.5 | 9 Gems size on pictureRecommended material - silver or gold! Approximate metal weight (for ring size 18 mm): gold 14k – 4.4 grams; gold 18k – 5.2 grams; silver 925 Sterling – 3.5 grams. Model volume (for ring size 18 mm): 335.9 cubic mm. Model avalible in STL format for 3D Printing and prototyping on CNC. Geometry is healed, and fixed all the bad with RP Magics software You can check out my other products by clicking on the author name s.kim_jewelry_design. Any questions? Please contact me. instagram @s.kim_jewelry_design email skimjewelrydesign@gmail.com facebook s.kim_jewelry_design youtube SKIM Jewelry Design
Thank you!